Blow molding machine and associated mechanisms
US8075834B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2008 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Oct 31, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2793/0081
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A machine (10) for blow molding containers (110). The machine (10) has a stationary flow head (26) located above a turntable (12) with molds (16) mounted on carriages (38). The carriages (38) are mounted on ramps (40) and are raised to remove containers (110) and are lowered from the flow head (12) using a closed loop hydraulic system actuated by a cam. A double rack-and-pinion assembly (78) guides opening and closing of the molds (16) and a locking system having locking shafts (94, 96) engaging apertures (98, 100) in a cross head (74) with pivoting locking keys (102, 104) movable into alignment with the apertures (98, 100) prevents inadvertent mold opening. A container transfer device (32) has inflatable bladders (140) which engage the interior of the containers (110) to prevent damage. Augmented cooling of the containers (110) in the mold (16) is provided by positioning the flow head (26) at an acute angle (28) to the transfer device (32). Different molds (16) may be positioned on the turntable (12) in an alternating arrangement to facilitate production changeover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.